Hi guys, im currently stripping down the brake system of my track car 6. And iv noticed there's a leak between the Master cylinder and brake servo and just wondered here would be the best place to get new seals from? Do Peugeot still supply seals?

And the other thing being the sensor on top of the master cylinder reservoir has snapped just before the plug from the loom attaches. Can i get a new one of these? or would it be better to get a new/second hand master cylinder. Cheers